Child of parent with Leukemia/Cancer

Hi all,
I was just curious about other people who have had a parent with leukemia or cancer. I have 2 friends with similar childhoods and the three of us are in agreement that we feel that we are bound to get it.  My mom was diagnosed with Hairy Cell Leukemia when I was 12, she went into remission and has been out for 4 or so years now.  I'm 26 now, and I know her leukemia was completely due to her enviroment, yet I can't help but think that I am bound to get it one day or another.  I'm just simply curious if anyone else out there feels this way as well? Or if it was just the age that my friends and I were when our parents were sick that affected us this way.